Nailing mechanism



J. H. GIBSON.

NAILING MECHANISM.

APPLICATION FILED SEPT. 15, 1919.

Patented Aug. 3, 1920.

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WITNESS:

A 'I'TORNEYv J. H. GIBSON.

NAJLING MECHANISM. KEPHCATIQN FILED SEPT.15, 19'19.

1,348,71 1 Patented Aug. 3, 1920.

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ATTORNEY.

flanges are separated by a space 9 sufficiently UNITED STATES PATENT OFFICE.

NAILING MECHANISM.

Specification of Letters Patent.

Patented Aug. 3, 1920.

Application filed September 15, 1919. Serial No. 323.683.

T 0 all whom 2'25 may concern: Y

Be it known that 1, JOHN H. GIesoN, a

citizen of the United States, residing at Little Falls, in the county of Morrison and State of Minnesota, have invented new and useful Improvements in failing Mechanism, of which the following is a specification.

The object of my present invention is the provision of a simple, durable and easily operated mechanism for feeding and driving nails in rapid succession.

To the attainment of the foregoing the invention consists in the mechanism hereinafter described and definitely claimed.

In the accompanying drawings, hereby made a part hereof:

Figure 1 is a side elevation of the device constituting the preferred embodiment of my invention.

Fig. 2 is an end'elevation of the same.

Fig. 3 is a top plan view.

Fig. 4: is a detail longitudinal vertical section through the device on line 14c of Fig. 2. r

Fig. 5 is a detail transverse section on line 55 of Fig. 1.

Figs. 6 and 7 are enlarged detail views of the rotary magazine and its appurtenances.

Similar numerals of reference designate corresponding parts in all of the views of the drawings.

Among other elements the preferred embodiment of my invention comprises an open frame 1, having a handle portion 2 on the rear end of which is preferably carried a nail puller 2.

Carried on the frame 1 is a hopper 3, equipped with a cover at that is designed to prevent the displacement of nails incidental to the operation of the device. In the hopper 3 are spaced transverse rods 3*, designed to promote the downward passage of the nails in proper positions.

Vith a view to preventing nails from passing the edge of the hopper 3, I provide a composition wiper 5.

Mounted in the frame 1 and disposed below the hopper3 is a circular casing 6, and in the said casing is disposed the rotary magazine of the device. As best shown in Fig. 5, the said magazine comprises two parallel annular members 7 having on their perimeters inwardly directed flanges 8 which wide'to permit the passage of nail shanks but not the heads thereof. In the opposed edges of the said flanges 8 are notched depressions arranged in pairs to form peripheral sockets for the reception of nail heads, the shanks of which are free to extend toward the center of the magazine. The disks 7 are fixed to a shaft 7 and also fixed to said shaft and arranged alongside the casing 6 is a ratchet disk 10. Too free turning of the rotary magazine is prevented by a rubber shoe 11 carried by the casing 6 and opposed to the outer side of one of the annular members '7 of the magazine.

' Carried in the lower portion of the frame 1 are magnetized hammer heads 12 and 13, the same being sheathed and movable rectilinearly in a casing 14, that is mounted to rotate loosely on a transverse shaft 15. Each of the hammer heads is backed by a spring 15, and carries a pivoted ratchet bar 16, pressed inwardly by a spring 16 and having a beveled inner hook end 16 to engage a beveled keeper 16 carried by the asing 1%, Fig. 7. The shaft 15 is fixed in the frame 1 and is provided with a ratchet portion 15, Fig. 1. Each of the ratchet bars 16 is also provided at its inner end with a lateral arm 16 that is disposedand movable in a slot or opening 16 in one side wall of the casing 14:, and is adapted to be engaged by a tappet 16 on the frame 1, Figs. 1, 2 and 6.

Arranged within the casing 14 and loosely mounted on the shaft 15 is a ratchet disk 17 on which is a pawl 17 arranged to engage the ratchet portion 15 of the shaft 15. To the said ratchet disk 17 is attached one end of a strong coiled spring 18 the opposite end of which is fixed to the casing st.

Arranged at the inner side of one side of the frame 1 is a rectilinearly movable detent 19, Figs. 1 and 2. The upper end of this detent is opposed to the traverse of the ratchet disk 10 and is yieldingly held against the same through the medium of a spring 20. A retractile spring 21, Figs. 1 and 2, is designed to move the detent 19 downwardly. it its lower end the detent 19 is provided with an arm 22.

As before stated, the hammer heads 12 and 13 are magnetized, and consequently it will be observed that when the parts are positioned as shown in Fig. 1-, a nail will drop head foremost from the rotary magazine,

and the head of the nail will be attracted and held to the outer end of the uppermost hammer head. Then when the hammer is wielded and the lowermost hammer head 13 I will be forced upwardly, and the ratchet disk 17 will be turned through a part of a revolution so as to compress the spring 18, and the hook end 16 of said ratchet bar will be engaged with the keeper 16, with the result that said ratchet bar will be released or disengaged from the ratchet disk 15. Then when the hammer head 13 is raised from the object struck, the spring 18 will operate to turn-the casing 14: through 180 degrees, and so as to place the hammer head 12 lowermost. This operation is repeated incidental 'to the use of the mechanism, and it will be apparent that as the arm 16 on each ratchet bar 16 is forced upwardly in the mannerbefore described, it will force upwardly the detent 19 against the action of the spring 21, and thereby bring about a partial rotation of the ratchet disk 10 and the revoluble magazine fixed with respect to said ratchet disk 10. As the casing 1 1 turns in the direction indicated by arrow in Fig. 1, the lateral arm 16 on the ratchet bar will pass from under the arm 22 of the detent 19, whereupon the spring 21 will draw said detent downwardly in readiness for another operation. Then when the arm 16 on the ratchet bar comes into engagement with the tappet 16 on the frame 1, the hook end 1l6? .of the ratchet bar will, by the said tappet 16 be disengaged from the'keeper 16 so that the hammer head complementary to the ratchet bar referred to, will be arranged as shown at the right of Fig. 7.

In thepractical use of the mechanism, the nails are'placed in the hopper 3, and the hammer is struck against an object a number of times until the first nail is positioned on the uppermost hammer head when, by reason of the magnetic attraction of the presented hammer head, plus gravity, the head of the nail will be held against the face of the hammer head, and subsequently the driving of each nail will be attended by the automatic positioning of another nail for driving.

Having. described my invention, what I communication with the hopper and having a discharge aperture, rotary feeding means disposed in said casing, a rotary hammer casing mounted in the frame and carrying magnetized hammer'heads, said hammer heads movable rectilinearly in said hammer casing, means actuated by the rectilinear movement of said hammer heads to rotate said hammer casing, and means for transmitting step by step rotary motion from said rotary hammer casing to ,the rotary feeding means.

2. In a nailing mechanism, the combination of a frame having a handle portion, a casing, rotary feeding means in said casing, means to rotate said feeding means carried by and movable endwise on the frame including an arm, a rotary hammer casing mounted in the frame and provided with apertures in which are disposed rectilinearly movable magnetized hammer heads, keepers in the casing, springs backing the hammer heads, ratchet bars connected to the hammer heads and adapted to engage said keepers and having arms adapted to engage and raise the arms of the means that cause rotation of said feeding means, a shaft in the frame about which the hammer casing is revoluble, said shaft having a ratchet portion, a ratchet disk loose on said shaft and arranged between the ratchet bars and having a pawl to engage said ratchet portion of the shaft, a spring connected to the hammer casing and said ratchet disk,"and a tappet on the frame and adapted to engage the lateral arms of the ratchet bars to disengage said bars from the said keepers.

3. In a nailing mechanism, the combination of a frame, a revoluble hammer casing mounted therein and carrying magnetized hammer heads, means for delivering nails one by one and head foremost to the upper- I most head of the hammer, means for rotatjerable by rotation of the hammer casing to actuate the nall-dehverlng means.

In testimony whereof Iaflix m signature.

JOHN H. IBSON. 

